Work-presenting mechanism for sewing-machines



T. J. HAYES.

WORK PRESENTING MECHANISM FOR SEWING MACHINES.

APPLICATION, EILED JULY I0, 916- Patented Mar. 9,1920'.

3 SHEETS-SHEET l.

T. J. HAYES.

WORK PRESENTNG MECHANISM FOR SEWING MACHINES.

APPLICATION FILED JULY l0, 1916.

3 SHEETS-SHLET 2.

Patented Mar. 9, LQZQ nvenov. Thomas d. Hayes by en/m M5( @ww/v.. Ays.

T. J. HAYES.

WORK PRESENHNG MECHANISM FOR SEWING MACHINES.

APPLICATION FILED IuIY I0. 191e.

1,333,310, Patented Mar. 9,1920.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

THOMAS J. HAYES, F ROSLINDALE, MASSACHSETTS, ASSIGNOR TO ARBETTER FELLING MACHINE COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

WORK-PRESENTING MECHANISM rFOZR. SEWING-MACHINES.

Specification of Letters Patent.

Patented Mar. 9, 1920.

Applicatioxi med July 1o, 191e. serial No; os,279.

To aU Lelio/ny t may concern:

Be it known-that I, THOMAS J. Harms, a citizen of the United States, and resident of Roslindale, county of SuHolk,- State of Massachusetts, have invented an Improvement in Work-Presenting Mechanism for Sewing-Machines, of which the following description, in connection with the accompanying dra-wing, is a specification, like characters on the drawing representing like parts.

This invention relates to improvements in work presenting mechanism" for .sewing machines and the principal object thereof is to .provide a simplified bender mechanism nism being provi but adapted to permit the bender to yield which will be easy of construction, sure in operation and accurate in adjustmentl In order properly to present the goods to the needle the bender must be elevated t0 the proper height upon each movement. f Otherwise the stitch-taken in the work ivill be too4 shallow or too deep and any looseness or wear of the benderoperating parts will result in the improper operation of the bender. One of the objects of the invent'on therefore is. to provide a bender of a rigid character which may be readily and accurately adjusted.

This is accomplished in the present invention by providing a bender which preferably is supported rigidly upon a pivoted bender supportin member, suitable mechaed for operating the same when an obstruction is encountered.

The bender supporting member preferably is inthe form of a relatively long arm carrying at one end a bender and supported at its opposite end upon a pivot located at a considerable distance from the bender, pref erably along the longitudinal axis of the machine, the pivot desirably being so located that the movement of the bender will be substantially normal to the surface of the bed plate.

'Another object of the invention is to provide means whereby the height of the bender may be accurately adjusted preferably combined ;vith means providing a yielding connection between the bender supporting arm and its actuating mechanism.

Another object of the invention is to provide guiding meansjfor the bender which' will prevent any lateral vibration thereof and which may be quickly adjusted to take up wear.

In designing bender mechanism, particularly for use in blind stitch sewing machines in which the needle and complemental stitch forming mechanism is located and operated from above the bed plate of the machine considerable difficulty has been encountered in providing means for withdrawing the bender an adequate distance and with sufficient rapidity to avoid the moving feed dog when a thick seam is passing between the work support and the presser foot.

This is particularly difficult where the bender is elevated at every other oscillation of the needle as in usual forms of blind stitch felling machines since the bender actuating cam is revolving only at half the speed of revolution of the cams which actuate the feeding mechanism.

Another object of the present invention is to provide a mechanism which will quickly raise and lower the bender sufficiently to avoid the feed dog under all conditions of work. This is accomplished in thepresent embodiment of the invention by providing a cam having a dwell to sustain the lbender during the penetration of the needle, the.

cam being actuated by a variable speed motion which will cause the rapid raising and lowering of the bender supporting member.

Another objeet of the invention is to provide a bender actuating mechanism which can readily be modified to cause the bender to be actuated upon each stroke of the needle, asfis customary in paddin or upon alternate'strokes as is usual in ,b ind stitching for felling. This is accomplished in the preferred embodiment of the invention lllustrated herein by providing certain adjustable bearings for a divided bender shaft having its sections out of alinement and connected by means adapted to transform a constant movement of one portion of said shaft into a variable movement for the other orcam actuating section of the shaft, said adjustable bearings permitting the sections of the shaft'to be placed in alinement when the bender is to be actuated upon each This will permit the use either ofa straightvide a construction adapted vmore easily tol be asembled and adjusted than has heretoforebeen accomplished in order to savepthe labor of machining.

Other objects-of the invention will more fully appear from the following description and the accompanying drawings and will be pointed out in the annexed claims.

In 'the drawings:

Figure 1 is a side elevation of a blind stitch sewing machine embodying an illustrative form of my invention', i

Fig. 2 is a bottom plan view of la sewing machine bed -plate illustrating a preferred form of bender actuating ,mechanism in which the bender is adapted to be actuated upon every `valternate oscillation of the needle. y I l Fig. 3 is a longitudinal sectional view of the same,

Fig. 4 is a bottom plan view of a portion of a similar bender mechanism adapted to actuate the bender upon every oscillation' of the needle,

Fig. 5 is a detail view of the bender actuating cam, Fig. 6 is a detail view showing the sections of the bender shaft connected. by a sleeve,-an alternative construction to that illustrated in Fig. 4.

Fig. 7 is a detail view of the adjusting mechanism for `the bender.

The present invention is illustrated herein as embodied in a blindv stitch sewing machine of theAi-better` type having a bed plate l preferably provided withl an 11pwardly., projecting 1 boss 2 forming a base for thestandard which carries the usual overhangingfarm Landlhead y5. The main shaft 6 is journaledflifn suitable bearings in the arm and is driven bya pulley 7 which may be clamped-. xmlygupon the slaft hy the screw 8 or ireleaseditherefromsufficiently to permitthe pulley'f `runfreer Iin bobbin winding,4

The needle actuatingmechanism preferably is carriedby vthey-Il ejad and as illustrated herein comprises lneedle supporting arm 9 pivotally inountedupon a stud 10 in the upper portion' ofthe' head of the machine, the lower end of the needle' supporting arm 9 being bifurcatedio provide ]ournals 11 for a needle bar 12 carrying a curved needle. The needle bar is oscillated through 26 to the end of a bender supportingmema. link 13 `suitably actuated from'the main shaft and connected to an arm 14 of the needle bar. Lateral or shogging movement may be imparted to the'needle through a camv 15 connected by a link 16 to the needle supporting arm 9,' said cam being driven by a gear 17 actuated by a companion gear -18 upon the main shaft.

A ny suitable take-up mechanism may be provided for the purpose of setting the stitch. The complemental stitch forming mechanism preferably, `is in the form of a rotarya loop taker or hook supported in the hook bracket 19rde'pending from the head of the machine. The hook bracket also preferably carries a presser foot 20 which is adapted' to coperate with a vertically movable work support 21 preferably of the characterused in the Arbetter type of machines and which need not be illustrated herein as it formsno essential part of the present invention. I

In such constructions the presser foot and feed dog are alternately reciprocated toward and from the stationary presser foot which Yis carried by the 'head 'of the machine and it is thereforev necessary for the bender mechanlsm to be given such'a movement as to permit the proper movement of the feed dog without interference eventhough the work support and feed dog are depressed a considerable distance by, the passage of a tlick seam or when operating upon thick goo s.

It is also essential under suchv conditions that the Abender be raised and lowered quickly to enable it to clear the path of the feed dog.

The p'resent form of bender mechanism illustrated herein is particularly adapted to accomplish -lthis result.

In the preferred embodiment of the invention illustrated hereinvthe bender 22 is rigidly secured to one end of a beder su porting member or arm 23 which -is pivoted at its opposite end upon a shaft orpin 24 preferably mounted in the .boss 2 which vextends upwardly from the bed plate, the pivotal axis of the bender supporting memplane of the bed plate and .work support.

The,` bender 22 preferably is. L-shaped, the extension 25 being secured rigidly by screws ber 23. 'Suitable dowel pins A,27 vmay .also be provided tojnevent any possible'movement of the bender relatively to the arm.

\ The bender supporting member 23 is-actu- 125 ated through a reciprocating member which 1s yieldably connected to the bender supportingarm to permit yielding movement of the bender in case its end meets an obstruction in the work,v such as athick seam. Any 13\4 aol suitable reciprocating mechanism may be yieldably connected to the bender. The. preferred mechanism illustrated herein however comprises a lever 28 pivotally mounted at one end, preferably upon the same shaft 24 as that lwhich constitutes the pvot for the bender supporting member 23.

The benderactuating lever 28 is provided at its opposite' endl with a boss 29 1n which an adjusting screw 3() is seated said adjusting screw having an extension 31 of decreased diameter which passes freely through an aperture in Van ear 32 extending laterally from the bender supporting lever 23.

The lower end of the threaded portion of the screw 30 provides a shoulder 33 vwhichmay be adjusted downwardly to engage the ear upon the bender supporting member and serve as an adjustment for the height to which the bender may be raised so that the bender may be adjusted for different thicknesses of goods. The uppermost elevation of the bender is limited by the contacting of the boss 29 with the ear 32 so that the bender cannot be raised enough to injure the needle.

This yieldable connection betweerf the bender supporting member and the bender actuating lever may be located in any desirable position but preferably is in proximity to the bender, as between the bender and the mechanism which actuates the bender supporting lever. In such construction the bed plate may be provided with a cup shaped recess 34 through which the end of the adjusting screw 30 may extend when the bender is inv elevated position and the screw 30 may be provided with a knurled nut 35 by which it may conveniently be adjusted by the operator.

The reciprocable member or lever 28 may be actuated in any suitable manner but preferably is operated by a cam 36 mounted upon a bender actuating shaft 37 extending -transversely of the machine and carried by bosses 38 and 39 depending from the under surface of the bed plate. 4

The lever 28 preferablyis provided with laterally extending ears or flanges 40, 41 to which wear plates 42 and 43, adapted to engage the cam 36, are secured. The cam 36 preferably has an extended hub 44 which is secured to the shaft by suitable set screw or a tapered pin 45. The bender actuating l shaft 37 is rotated through a train of gears comprising a niiter gear 46 having a h'ub 47 suitably secured to the shaft 37 and a c0- operating gear 48 carried` by a counter shaft extending longitudinally of the bed plate of the machine.

For convenience in assembling and in taking up'wear the bosses 38 and 39 are bored to receive bushings 50fwhich lare adjustably secured in said lugs by screws 51. In ascam is then located properly actuating shaft 37 with the cam 36 and beveled gear 46 thereupon is inserted in the bushings, the

40 on the lever 28 and the setscrew in its hub 44 tightened. The miter gear 46 is then adjusted upon the shaft until it runs freely with the gear 48 whereupon it is cured to the shaft and the bushing members 50 are then pressed tightly against the outer hubs of the cam and the miter gear 46 respectively so that longitudinal movement of' the shaft 37 is absolutely prevented. By this arrangement the `necessity for accurate drilling and machining o'f the boss is rendered unnecessary and convenient means provided for repairing the worn out parts since the bushings 50 may accurately be adjusted inwardly to take up for the wearing of the gears and when bushings are worn out they may easily be replaced. i

In order to prevent lateral movement of the bender mechanism a guide is provided which preferably embraces the bender supporting arm 23 and its actuating lever 28. This guide preferably is located between the bender actuating device andthe free end of the bender supporting member. A preferred form of guide which is illustrated herein comprises a pair of plates 52 onedof which is Isecured to theunder surface ofthe bed plate by suitable screws and 4dowel pins and the other of which is adjustably secured `to the bed `plate by a screw and slot connection, each of said plates being provided with upwardly extending ears 52X which are connected together by a bolt 53 extending through suitable slots in the bender suprigidly sebeneath the ear porting arm 23 and its actuating lever 2-8.

The bender supporting lever and bender actuating lever` preferably are provided with thickened portions or bosses 23 and 28x which may be easily and economically machined to provide guiding surfaces toengage the ears 52X of the guidel plates and also to engage each other. v

In viewof the fact that blind stitching machines are used mainly for felling and for padding it is desirable that the essential parts of the machinev be so constructed that in its manufactureI the same bed plate and superstructure may be used as in the manufacture of machines for either kind of work.' i

The present embodiment ofthe invention is illustrative of a convenient constructioniby which either a padding machine or a felling machine may be made, or in fact one type of machine transformed into the other by a mere adjustment of parts and. the substitution of suitable gears for driving the bender shaft to actuate the bender incooperative relation to the needle for the character of work desired.

In padding the bender is actuated to raise the goods into the path of the needle upon each stitch and consequently operates in synchronism with the needle and feed dog mechanisms so that the ca m above 4described alone will serve to withdraw the bender from the path of the feed dog.

In felling work, `however, in which a superimposed layer is sewed to a'base layer of material the bender is actuated upon alternate thrusts of the needle to present thev base layer in its path and consequently there are two movements of the feed dog to one movement of the bender. It is therefore desirable if not absolutely essential that vthe `the breakage of the needle.

lIn `order to accomplish this result the bender cam is provided with a dwell of suilicient'extent to sustain the bender in its elevated position the required amount of time, the cam being given a variable speed of rotationiwhich will speed up quick raising and lowering movement above described.

Ay preferred form of cam which is illustrate'dfin Fi 5 of the drawing comprises an extended IOW portion a, relatively steep portions b yand a dwell c. The cam may be given a variable speed of rotation in any.'-

' suitable manner but conveniently is driven by a divided counter shaft consisting of sections and 56 the section 55 being mounted in bracketsv 57, 58 securedto the bed plate and the section 56 being mounted in adjustable brackets 59 and 60, the process of which adjustment will be hereinafter described.

The counter shaft sections 55 and 56 desirably are located in the same horizontal plane below the surface of the bed plate but are offset from one another and connected by means through which the constant rotation of the shaft, 56 will causev a variable l speed of rotation of the shaft 55. .This

mechanism as illustratedherein comprises arms 61 and 62 rigidly secured by pins 63 apertures. 'I

and 64 respectively tothe ends-of the shafts 55 and 56, the ends of the arms being con-f 'nected by a link'65.

In order to provide means for taking up'r wear at'the pivots of the link'65 with the arms 61, 62, the arms 61-62 are provided at their ends with bosseshaving screw threaded `apertures and the ends of the link 65 are likewise provided with bosses having tapered Pivotal screws having conical surfaces66 'and cylindrical screw threaded r for felling as illustrated herein the gears vided '.clounter shaftma'y be shanks are passed through the bosses inthe link 65 -and screwed into the bosses in the ends of the arms 61 and 62 and are then tightened sufficiently to make an easy running it whereupon nuts 68 are screwed -tightly against the ends of the bosses to lock If any wearthe screws from movement.

takes place the screws 66 may be tightened in an obvious manner.

The shaft 56 may be rotated in any convenient manner preferably through a gear 69 which meshes with agear 70 upon a shaft 71 which is provided at its upper end with a -suitable gear 72 meshing with a gear 73 upon the main shaft 6.

The gears 72 ,and 73 may be of equal diameter andwhen the machine is arranged and 69 will be so proportioned as to cause one rotation-of the shaft 56 to every rotation of tllie main shaft 6 so that the bender will be raised and lowered upon alternate stitches asabove describedwhile 4the variable movement will cause the desired rapid elevation and depression of the bender. In 4such case the gears 69 and 70 are providedrespectively with teeth arranged at an angle-fof 60 and 30 degrees to 'thecentral plane fv the gear. When it is desired to utilizejthe -machine for paddingthe adjustablebearings, 59 and 60 may be removed from the positions illustrateid in Fig., 2sand placed:4 in? alinement to accommodate a straight shaft'fj75fsnch as is illustrated in Fig. 4 inz-which it may be only? necessary t'o usefthe extreme' bearings 57 and 60..; Alternatively lhiowever, fthe' diy utilized'by removingrithe armsl-an 62 ndithejconnecting link 65 vand con the-sections 56 and 55 of the divided sh'aft bya suitable sleeve 7 6 as is illustrated in detailin Fig. 6. In the latter casethe gears 69 and 70 which are'prov'ided respectively with teeth of 30 and -60 vdegrees inclination to the ,vertical .plane of the gear will be removed and 'gears of equal diameter Having teeth arranged at an angle of 45 degrees to the plane of the gear will be substituted.

Byl such `construction the machine may be readily transformed from a felling machine into a padding machine or vice versa according to the requirements of the operator or either machine may be constructed in the .factory with mininlm cost of labor and material. i"

In order further to reduce thecost of mauufacture and upkeep thebearings 57 and 58 and 59 andV 60 may be constructed as brackets adapted to be secured to the bed plate ot' themachine and any or all of said bearing`- may be provided with removable bushings 77 adjustably secured therein by set screws- 78. This will materiallyl aid in assembling of thetmachine since the shaft' may be inl stalled and the bushings thrust against the vits 'reciprocable member,

structures substituted within the meaning of `the followingclaims.

Having thus described my inventionwhat I claim as new and desire to secure by Letters Patent is:

1. Work presenting mechanism for sewing machines comprising a bender, a pivotally mounted bender supporting member, a means for actuating the same, and means located intermediate of said benderand its pivotalv support yield- -ably connecting said bender supporting member and said reciprocable member.

2. Work presenting mechanism for sew'- ing machines comprising a bender, a pivotally mounted bender supporting member, a reciprocable member located adjacent to and lying in parallelism with said bender supporting member, means for actuating said reciprocable member, and means located intermediate of said bender and said actuating means yieldably connecting said bender supporting member and said reciprocable member. f

3. Work ing machinescomprising a bender, a pivotally mounted bender supporting member, a reciprocable member located adjacent to and lying in parallelism with said bender supporting member, means for actuating said reciprocable member'and means located in proximity to said bender yieldably and adjustably connecting said bender supportingl means and said reciprocating member.

4. Work presenting means for sewingmachines comprising a bender, a pivotally mounted bender supporting member rigid therewith, a bender actuating lever, yieldably connecting said bender supporting member to said bender actuating lever, a cam engaging the latter and means for actuating said cam. 5. .Work presenting means for sewing machines comprising" a bender, la pivotally mounted bender supporting lever rigid therewith, a bender actuatin lever lying in parallelism with said ben er supporting lever, means yieldably and adjustably connecting said bender supporting -lever to said bender actuating lever, a cam engaging the latter and means for actuating the cam.

6. Work supporting mechanism for sew.- ing machines comprising a bender, a bender supporting member and a bender actuating lever pivotally mounted upon the same axis,

presenting mechanism for sewmeans means for reciprocating said lever and yieldabl lever to said bender supporting member.

Work presenting mechanism for sewmg machmes comprlsmg a bender, a p1votally mounted bendersupporting member, a

bender actuating lever, means yieldably connecting said bender supporting member to ysaid lever, a cam having a dwell engaging said lever and means for rotating said cam, whereby the bender will be quickly raised and lowered and caused to 4dwell during the penetration of the needle.

e means connecting the said actuating y 8. Work presenting mechanism for sewing machines comprising a bender, a pivotally mounted bender supporting member,

a bender actuating lever, means yieldably.y

connecting said bender supporting member Itosaid lever, a cam having a dwell engaging said lever, and means for imparting a variable movement to said cam whereby the period of dwell of said cam will be prolonged.

9. Work presenting mechanism for sewing machines comprising a bender, a pivotally mounted bender suportingmember. a bender actuating lever, means yieldabljv connecting said bender supporting member to said lever, a cam having a dwell engaging said lever, and means including a countershaft having connected diiierentially rotatable sections for imparting a variable movement` to said cam whereby dwell of said camwill be prolonged.

10. In a blind stitch sewing machine comprising a bed plate, and stitch forming mechanism including an oscillating needle bar located above the bed plate, work presenting mechanism including a bender, a pivotallv mounted bender supporting lever extending longitudinally of the bed plate, a reciprocable member yieldably and adjustably connected to said bender supporting `member and means' for actuating said rethe period of plate, and stitch forming above'the bed plate and means for reciproeating said reciprocable member.

i 12. In a blind stitch sewing machine comprising a bed plate and mechanism including an oscillating needle bar located above 'the bed plate, work pre- Ysenting mechanism including a bender, a

pivotally moun ed bender supporting lever extending longltudinally of the bed plate,

guiding vmeans for said bender supporting' stitch forming member locatedy in proximity to the bender, a reciprocable member, means yieldably connecting said bender supporting' member and said reciprocable member and means for actuating the latter.

' 13. In a blind stitch 'sewing machine comprising-v a bed plate, and stitch forming mechanism including an oscillating needle bar located above the bed plate, work presenting mechanism including a bender,` a bender supporting member and a bender actuating lever pivotally. movable about the same axis and extending in parallelism longitudinally of the bed plate of the machine,`

means yieldablyconnecting said bender supporting member 'and `said lever, guiding means engaging said bender supporting member .and said bender actuating lever in proximity to said bender, and means for reciprocating the bender actuating lever,

14. .Ina blind stitch sewing machine coin- .prising a bed plate,l and stitch forming mechanism including an, oscillating needle 'bar located above the bed plate, work presenting mechanism including a bender, a

bender supporting member and a `bender actuating lever pivotally movable about the same axls and extending in parallelism-lon4 gitudinally of the bed plate of the machine, means yieldably connecting said bender supf. porting member and said lever, guiding 'means engaging said bender supporting member and said bender actuating lever 1n proximity to said' bender, a cam having .a

dwell, mounted upon a transverse shaft and v engaging said bender actuating lever and means for rotating said cam.

15, In ablind stitch sewing machine comprising a bed plate,-'and stitch forming mechanism including an oscillating needle bar located above the bed plate', work presenting mechanism including a bender.` ar

l proximitylto said bender, a cam having a dwell, mounted upon a transverse shaft and bender supporting memberv and a .bender actuating lever pivotally movable about the same axisvand extending in parallelism longitudinally of the bed plate of the machine, means ,yieldably Connecting said bendersupporting member and sald lever, guiding means engaging said bender supporting member and said bender actuating lever in engaging -said bender actuating lever and means for imparting a variable speed of rotation to said cam whereby a quick elevation and depression of the bender will be pro duced.

said bender' supporting` member.

shaft supported 'in bearings secured to the bender supporting member, meansl vro- 'H tating Isaid cam including a divided countershaft consisting vof two sectionsextending' in parallelism, one of said sections being opn eratively connected to said cam, driving vmeans forV the other section and means connecting said shaft 'sections adapted to im' part a variable speed of rotation Ato the cam. i.

17. In a blind stitch sewing machine com-v prising a 'bed yplate, and. stitch forming mechanism including an' oscillating needle bar located above'the bed plate, work pre- -senting mechanism comprising a. bender supporting member having a bender rigidly connected at one end and mounted at its opposite Aend upon a ivot located above the bed plate,.whereby t e path of-thevbender when engaging the work will be substan-/ tially normal to the plane of the surface of the bed plate andmeans for actuating said 85 bender supporting member. l v ,18, InY a blind stitch sewingI machine comprising a plate, a standard rising tlierefrom having anarm,-a head'overhanging the bed plate, and stitch forming mechanism including an oscillating needle bar carried by said head, Work .presenting mechanism ineluding a bendensgpporting leverhaving abender f y i rigidly secur at one end and mounted at its opposite end upon a pivotal support within Isaid. standard and v above the planel of the' base plate wherebyfthe pathV of, the

bendery when engaging the work will be substantia-lly normal to the planeof the surface of the bed plate and means for actuating Y 19. Ina blind stitch sewing machine comprising stitch forming mechanism, work presenting mechanism including'a bender, a benderactuating shaft, a countershaft having one section connected -to said bender :1c-. tuating shaft and means for driving the other section of said countershaft, means for adjusting one of the sections of said'countershaft to permit the use-of different 'gears whereb the timingl of the bender forxdif ferent 'nds of work may be varied.- l

20, In a blind stitch .sewing machine com prising a bed plate, and stitch forming mechanism including'an oscillating needle bar located above the same, work presenting mechanism including a bender, 'a bender i supportingv member, .a bender actuating bed late, a vcountersha-ft means for actuatm the same, intermeshin gears upon said nder actuating shav and said countersliaft and means for adjusting cershaft 'and said, countershaft whereby the l timing of the bendermay be varied for different kinds of work.

' 21, In a blind man sewing @chine oomiao' Y mechamsm including, an oscillating needle prising a bed plate, and stitch forming bar located above said bed-plate, a-bender, a bender actuating shaft, a divided countershaft supported in bearings secured to said bed plate', a main shaft, means for actuating said countershaft fromsaid main shaft, in-

termeshinggears upon said Thender actuatingy shaft andsaid countershaft, means for counters adjustin the bearings of one section of said haft to permit the use ofalternative gears upon the, bender actuating shaft and the countershaft and, interchangeable means for connecting the sections of the divided countershaft whereby the bender actuating shaft may be given alternatively la uniform 'peed' of rotation or a variable one. end and mounted at its opposite end upon a pivot 'located above the Asurface of the bed plate, a bender actuating lever mounted upon the same pivot and extending in parallelism to and yieldably connected with said bender supporting member, a cam mounted upon a transverse shaft engaging said bender actuatinglever, a counter shaft extending longitudinally of the machine and connected by gearing to 'said transverse shaft, a main shaft, a means for actuating said countershaft from said main shaft, in-

termeshing gears upon. said countershaft and said transverse shaft and means for adjusting certain of the'bearings of said countershaft to permit the use of gears of dif- 40 ferent v diameter and different pitch upon said transverse shaft and countershaft fwheeby the timing of the bender may be varied for different kinds of Work.

23. In a blind stitch sewing machine comprising a lied plate, and stitch forming. mechanism including an l,oscillating needle bar located above the bed plate, a pivoted bender supporting member extending longitudinally of thel bed plate, a bender actu'- at'mg lever extending in parallelismwith and adjacent thereto and yieldably connected thereto, bearing surfaces upon said bender supporting v and adjustable guiding means engaging said y5'5 bender supporting membery and saidylever lateral vibration of t ebender. y

' 24. Ina blind stitchsewing machine, work presenting mechanism including a bender.-

THOMAS J. HAYES;-

member and said lever opposite said bearin surfaces, toh prevent supporting' member having a lateral extension and a reciprocable bender' actuating member having an extension overlying the extension upon the bender supporting member, an adjusting screw seated in one of said extensions and having a shoulder adapted to engage the other extension and resilientv means adapted to force said extensions toward each other whereby the bender supporting member will be caused normally to move in'l unison with said actuatin member `but Will yield relatively thereto W en the bender encountersan obstruction.

25. In a blind stitch sewing machine, work presentingf .mechanism including a bender supporting member havin a lateral extensionand a reciprocable ben er actuating'member having anfextension overlying the extension upon the bender supporting.

member, an adjusting screw seated in one of said extensions having a stem passing freely throu h thel other extension and a helical spring carried by said stem abutting 'a `ainst the latter extension adapted to force said eX- tensions toward each other.

26. In4 a sewing machine'comprising a bender and means for actuating' the same including a shaft, a cam on said shaft, av gearon saidsha-ft and means ',for rotating the same, bearings for said shaft includinglongitudinally adjustable bushings adapted to engage respectively the hubs on said cam and gear, kwhereby assembling of the mechanisms is'facilitated and means provided for compensating forwear. l

27. In a sewing machine ,comprising a bender and means for actuating the same-in-` cluding a shaft provided with actuating instrumentalities having hubs 'presenting flat faces of greater diameter than that ofthe y justable bushings adapted to be' force into engagement with the faces of said hubs and thereby to prevent longitudinal movement of said shaft, whereby the assembling of the parts of the mechanisms is facilitatedl andmeans provided efor compensating for wear.l

and having a cam fork, a cam within said.

fork continuouslyengagingi the members thereof, said cam having a needle and curved surfaces adapted to cause bv endt= r..b Y

testlmony whereof I Yhave signed my nameto this specification.

well vto sustain Vthe'bender during the penetration of the a quick elevation and depression of said 

